How to restore windows boot after installing Ubuntu 12.10.

After re-installed Ubuntu 12.10, I found my windows cannot boot from GRUB boot loader. So I have to do the following to resolve this issue (I assume you installed GRUB boot loader in the same place you install Ubuntu, otherwise you will be able to boot windows but not Ubuntu.):

Now you should see your original windows boot screen. But now you cannot boot Ubuntu anymore. So we have to make Ubuntu boot again. Install EasyBCD which is free for non-commercial users in windows. Open it and go to “Add New Entry” -> “Linux/BSD” -> type “GRUB2” -> give it a name -> click “Add Entry”. Don’t be fool by the text “Devices: (Automatically configured)”! You have not finished yet.